Drupal DDoS Prevention Code
// The following code will ensure that there are no more than 30 non-cached requests in 60 seconds. // Please adjust the first two variables below in a manner optimal to your server config. // Note that this only protects heavier non cached pages. // A powerful enough attack can even overload your server with requests for cached pages. function hook_init() { $MinTime = 60; $MaxAttmpts = 30; $MyAppDDoSCheckUrl = variable_get('MyAppDDoSCheckUrl'); $TimeCheckNow = time(); if ($MyAppDDoSCheckUrl == '') { variable_set('MyAppDDoSCheckUrl',$TimeCheckNow.',1'); return; } $SerDDosVars = explode(',',$MyAppDDoSCheckUrl); $TimeLast = intval($SerDDosVars[0]); $ReqAttmt = intval($SerDDosVars[1]); if ((($TimeCheckNow - $TimeLast) < $MinTime) && ($ReqAttmt > $MaxAttmpts)) { header('HTTP/1.1 503 Server busy, try again later'); die('The server is cur